Combined abrasive pulpifier and washing apparatus



Jan. 4, 1944.

E. 'r. VMOGREGOR COMBINED ABRASIVE PULPIFIER AND WASHING APPARATUS Filed Feb. 13, 1941 Patented Jan. 4, 1944 COMBINED ABRASIVE PULPIFIER AND WASHING APPARATUS Ernest Theodore McGregor, Vancouver, British Columbia, Canada Application February 13, 1941, Serial No. 378,760

1 Claim.

The invention relates to combined abrasive pulpifier and washing apparatus, and has for its object the disintegration, disentangling, of wet lap, sheet pulp and waste paper stock, and the further feature of the separation and washing away from, any and all matter foreign to the stock.

The invention consists essentially of the novel arrangement and construction of parts wherein, a hopper has a washing chamber extending angularly from its bottom end, and a water direction chute tangentially positioned and extending from the juncture of the hopper and aforesaid chamber adapted to receive at its outer opening the nozzle of a monitor and of a width to provide for said nozzle to oscillate thereacross. The said chamber is provided with a pressure reciprocating screen angularly positioned therein, suitable outlets being provided for waste water and pulp stock elimination therefrom.

Referring to the drawing- Fig. 1 is a horizontal end view of my apparatus.

Fig. 2 is a horizontal side view in partial section.

In the drawing like numerals of reference indicate corresponding parts in the drawing.

I represents a framework adapted to carry and position angularly a washing chamber 2, said chamber 2 having a closed top side portion 3 and bottom portion 4, said bottom 4 being curved upwardly to form the end 5, an opening 5A is left in the head end of the chamber to receive a hopper 5, and extending tangentially from the juncture of the hopper and the top side of the chamber is a water direction chute 8, the outer end! of said chute adapted to receive and position for oscillatory movement the nozzle of a monitor.. Positioned angularly within the washing cham-' ber is a corrugated screen 10A mounted on a frame H which in turn is slidably secured and positioned on the sides of the chamber, the bottom of the chamber is provided with a corrugated mat I2 extending up to the curved end.

In operation wet lap, pulp sheet, or waste paper stock is fed into the hopper 6, preferably in shredded form and here receives a partial wetting from the spray l3 which may be positioned thereabove, such wetting will cause the stock within said hopper to pack at its outlet end M. The monitor nozzle I 0 extending into the chute 8 will direct a stream of water under pressure tangentially against the mass of pulp stock cutting and shredding, by abrasive action the said pulp stock and driving the cut shredded fibre against the curved end 5 of the chamber 2, a turbulence will as seen be created which will be maintained by means of the corrugated mat 12 in conjunction with the slidably and angularly positioned screen IDA, the mass of discntangled pulp stock fibre will be driven against and retained by the corrugated screen, and due to the restricted outlet area M, will cause an up and down action of said screen whereby a gentle squeezing action will be given the iibre stock. The turbulent action in the chamber will drive the pulp stock along the corrugated surface of the screen whereby, due to the rolling therealong the fibre stock will rub against itself, and the individual fibres swelled, separated and disentangled, and matter foreign to said stock washed therefrom, said foreign matter in excess water being led away from the pulp stock through opening l5 at end I6 of chamber 2, while the pulp stock fibre will flow through opening I! of chamber 2 to stock box HA to be pumped away to a suitable stuff chest by pump l8.

It will be seen I have devised an efficient method of disentangling or pulpifying wet lap, sheet pulp or waste paper stock by an abrasive action using water under pressure as the abrasive means and washnig away matter foreign to said stock by agitation of the pulpified stock in excess moisture.

What I claim is:

A combined abrasive pulpifier and washing apparatus, comprising a downwardly sloping chamber having top, bottom and side walls and a curved upper end wall, a corrugated mat attached to the inner surfaces of said bottom and curved end wall, a corrugated flat screen in said chamber, said screen being spaced from the bottom, top and end walls and extending from side wall to side wall, said screen being pivotally mounted at its upper end and being freely movable at its lower end between the top and bottom of the chamber, a feed hopper having a rear wall which joins said curved end wall, an inclined chute joining the front wall of said hopper to the top wall of the said chamber, the bottom wall of said chute extending into said chamber so as to aid in directing material from the feed hopper against the curved end wall and between the screen and the bottom surface ofthe chamber, an oscillatable monitor nozzle positioned in said chute to direct a jet of water against the stock being fed through the hopper and impinge it against th curved end wall, a spray nozzle mounted above the said hopper adapted to wet paper stock therein, collecting means for the stock emerging from between the screen and the bottom of the chamber, collecting means for the water and material emerging from between the screen and the top wall of the chamber, and separate means for removing the material from each of the said chambers.

ERNEST THEODORE MCGREGOR. 

